Novel PMSM accurate discrete active disturbance rejection control method under low carrier ratio

A technology of active disturbance rejection control and carrier ratio, which is applied in the control system, generator control, motor control, etc., can solve the problems of low control accuracy and out of control, so as to avoid truncation error, reduce burden, improve stability and dynamic performance effect

Active Publication Date: 2021-04-23
XIAN UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a new PMSM precise discrete ADRC control method under low carrier ratio, which solves the problem of low control accuracy or even loss of control in traditional ADRC under high speed and low carrier ratio.

Method used

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  • Novel PMSM accurate discrete active disturbance rejection control method under low carrier ratio
  • Novel PMSM accurate discrete active disturbance rejection control method under low carrier ratio
  • Novel PMSM accurate discrete active disturbance rejection control method under low carrier ratio

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Embodiment Construction

[0076] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0077] A novel PMSM accurate discrete ADR control method under a low carrier ratio of the present invention, wherein the quasi-discrete linear ADR control vector system block diagram of a permanent magnet synchronous motor under high speed and low carrier ratio is as follows figure 1 As shown, follow the steps below:

[0078] Step 1. Establish a complex vector permanent magnet synchronous motor model, and obtain an accurate mathematical relationship between current and voltage after accurate discretization, specifically:

[0079] Step 1.1, establish a continuous domain complex vector PMSM model under the rotating coordinate system;

[0080] Described complex vector PMSM model is specifically as follows:

[0081]

[0082] In formula (1), u d , u q i d i q are the d-q axis voltage and d-q axis current in the two-phase rotating (d-q) co...

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Abstract

The invention discloses a novel PMSM accurate discrete active disturbance rejection control method under a low carrier ratio. The method specifically comprises the following steps: 1, building a complex vector permanent magnet synchronous motor model, and obtaining an accurate mathematic relation between a current and a voltage after precise discretization; 2, designing a discrete linear active disturbance rejection controller with disturbance compensation according to the accurate discrete domain complex vector PMSM model, and performing digital delay compensation on the active disturbance rejection controller; and 3, designing a discrete domain extended state observer feedback gain matrix for ensuring stable operation in a full-speed range according to pole assignment. According to the invention, the problems of low control precision and even out-of-control of traditional auto-disturbance rejection control under high speed and low carrier ratio at present are solved.

Description

technical field [0001] The invention belongs to the technical field of high-performance permanent magnet synchronous motor control, and relates to a novel PMSM precise discrete active disturbance rejection control method under low carrier ratio. Background technique [0002] Permanent Magnet Synchronous Motor (PMSM) is widely used in many transmission fields such as rail transportation, industrial control and household appliances because of its high efficiency, high power density, and easy field-weakening speed expansion. In the high-power traction drive system, in order to reduce the switching loss of power devices, the switching frequency of the inverter is only a few hundred hertz; in the ultra-high-speed and multi-pole logarithmic motor control system, the operating frequency can reach more than 500Hz. The above conditions make the inverter switching frequency (f PWM ) and motor operating frequency (f e ) ratio (carrier ratio f ratio = f PWM / f e ) is very low, some...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/34H02P21/13H02P21/22H02P25/026H02P27/08
CPCH02P6/34H02P21/13H02P21/22H02P25/026H02P27/08H02P2207/05
Inventor 尹忠刚黄文博张彦平原东昇
Owner XIAN UNIV OF TECH
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